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x86 boot loader: check gKernelArgs.arch_args.pgtables overflow

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Ingo Weinhold 2014-10-26 20:51:12 +01:00
parent ed489ba831
commit 4ce1f197fa
1 changed files with 5 additions and 0 deletions
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5
src/system/boot/platform/bios_ia32/mmu.cpp
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@ -161,6 +161,11 @@ get_next_page_table()
static uint32* static uint32*
add_page_table(addr_t base) add_page_table(addr_t base)
{ {
if (gKernelArgs.arch_args.num_pgtables == MAX_BOOT_PTABLES) {
panic("gKernelArgs.arch_args.pgtables overflow");
return NULL;
}
base = ROUNDDOWN(base, B_PAGE_SIZE * 1024); base = ROUNDDOWN(base, B_PAGE_SIZE * 1024);
// Get new page table and clear it out // Get new page table and clear it out